/* ============================================================================
   DBV247 — HEADER TRÊN ĐIỆN THOẠI
   Đổi icon "Danh mục" thành hamburger + thêm nút tìm kiếm.
   TẤT CẢ chỉ áp dụng cho màn hình từ 640px trở xuống. Máy tính giữ nguyên.
   ============================================================================ */

/* Nút tìm kiếm do JavaScript chèn vào — mặc định ẩn, chỉ hiện ở điện thoại */
.dbv-btn-search { display: none; }

@media (max-width: 640px) {

  /* --- 1. Đổi icon 4 ô vuông thành hamburger --- */
  .btn-catalog-hdr > svg { display: none; }

  .btn-catalog-hdr::before {
    content: "";
    width: 20px;
    height: 20px;
    display: block;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231C1C1C' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M3 6h18'/%3E%3Cpath d='M3 12h18'/%3E%3Cpath d='M3 18h18'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
  }

  /* --- 2. Vùng bấm đủ lớn cho ngón tay (tối thiểu 44x44) --- */
  .btn-catalog-hdr {
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    justify-content: center;
    border-radius: 10px;
  }

  /* --- 3. Nút tìm kiếm, đặt bên trái hamburger --- */
  .dbv-btn-search {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    border-radius: 10px;
    border: 1.5px solid var(--bd, #E2E8F0);
    background: #fff;
    color: var(--tx, #1C1C1C);
    cursor: pointer;
    flex-shrink: 0;
    transition: .18s;
  }
  .dbv-btn-search:active { background: var(--gl, #e8f5e9); border-color: var(--g, #007437); }
  .dbv-btn-search svg { width: 20px; height: 20px; stroke: currentColor; stroke-width: 2; fill: none; }

  .hdr-actions { gap: 8px; }
}

/* ============================================================================
   LỚP PHỦ TÌM KIẾM
   Không giới hạn theo kích thước màn hình vì chỉ mở được từ nút ở điện thoại.
   ============================================================================ */

.dbv-search-lop {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: #fff;
  display: flex;
  flex-direction: column;
  font-family: inherit;
  opacity: 0;
  visibility: hidden;
  transition: opacity .18s ease;
}
.dbv-search-lop.mo { opacity: 1; visibility: visible; }

.dbv-search-thanh {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--bd, #E2E8F0);
  flex-shrink: 0;
}

.dbv-search-o {
  flex: 1;
  min-width: 0;
  height: 44px;
  padding: 0 14px;
  font-family: inherit;
  font-size: 16px;            /* 16px để iOS không tự phóng to trang khi gõ */
  color: var(--tx, #1C1C1C);
  border: 1.5px solid var(--bd, #E2E8F0);
  border-radius: 10px;
  outline: none;
  background: #fff;
}
.dbv-search-o:focus { border-color: var(--g, #007437); box-shadow: 0 0 0 3px rgba(0,116,55,.10); }
.dbv-search-o::placeholder { color: #a0aec0; }

.dbv-search-dong {
  min-width: 44px; min-height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border: none; background: none; cursor: pointer;
  font-family: inherit; font-size: 14px; font-weight: 600;
  color: var(--tm, #4a5568); padding: 0 4px; flex-shrink: 0;
}

.dbv-search-than { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 8px 12px 24px; }

.dbv-search-nhan {
  font-size: 12px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .04em; color: var(--ts, #718096);
  margin: 12px 4px 8px;
}

.dbv-search-mucs { display: flex; flex-direction: column; gap: 2px; }

.dbv-search-muc {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 10px; border-radius: 10px;
  text-decoration: none; color: inherit;
  min-height: 44px;
}
.dbv-search-muc:active { background: var(--gl, #e8f5e9); }
.dbv-search-muc-ten { font-size: 14.5px; font-weight: 600; line-height: 1.35; }
.dbv-search-muc-mo  { font-size: 12px; color: var(--tm, #4a5568); line-height: 1.45; margin-top: 2px; }
.dbv-search-muc mark { background: #FFF3D1; color: inherit; padding: 0 1px; border-radius: 2px; }

.dbv-search-the {
  flex-shrink: 0; font-size: 10px; font-weight: 800;
  padding: 3px 7px; border-radius: 20px; white-space: nowrap;
  align-self: flex-start; margin-top: 2px;
}
.dbv-search-the.hot      { background: #FFEDD5; color: #C2410C; }
.dbv-search-the.moi      { background: var(--gl, #e8f5e9); color: var(--g, #007437); }
.dbv-search-the.batbuoc  { background: #E0E7FF; color: #3730A3; }

.dbv-search-trong { padding: 32px 16px; text-align: center; color: var(--tm, #4a5568); font-size: 14px; line-height: 1.6; }
.dbv-search-trong strong { color: var(--tx, #1C1C1C); }

.dbv-search-goiy { display: flex; flex-wrap: wrap; gap: 8px; padding: 4px 4px 8px; }
.dbv-search-chip {
  font-family: inherit; font-size: 13px; font-weight: 600;
  padding: 9px 14px; min-height: 40px;
  border: 1.5px solid var(--bd, #E2E8F0); border-radius: 20px;
  background: #fff; color: var(--tx, #1C1C1C); cursor: pointer;
}
.dbv-search-chip:active { background: var(--gl, #e8f5e9); border-color: var(--g, #007437); }

/* Khóa cuộn trang nền khi lớp phủ đang mở */
body.dbv-khoa-cuon { overflow: hidden; }